* {
    box-sizing: border-box;
}
html {
    font-family: sans-serif;
    font-size: 12px;
}
body {
    margin: 0;
    color: #333;
}
ul {
    margin: 0;
    padding: 0;
    list-style: none;
}
h1,
h2,
h3 {
    margin: 0;
    padding: 0;
}
em {
    font-style: normal;
}
a {
    text-decoration: none;
    color: #333;
    cursor: pointer;
}
.fl {
    float: left;
}

.fr {
    float: right;
}

.clearfix::after {
    content: "";
    display: table;
    clear: both;
}

.clearfix::before {
    content: "";
    display: block;
    clear: both;
}
